[vahid-ahmadi]

Corrects the future-dated policy announcements page (docs/book/policy/future-date-announcements.md), written for #636.

The page itself is already on main: it shipped in #2386 (merged 21 October 2026), and its original .added changelog entry was released in 2.143.0. This branch has merged main, dropped the released fragment and now carries only corrections to main's copy of the page.

What this PR corrects (from its changelog fragment):

Corrected the future-dated announcements page (docs/book/policy/future-date-announcements.md): the Class 1 employee rate now lives in employee_scale.yaml, the levy and repeal wording, the 30 April caveat for mid-year NI changes, the preserve_calendar_dates wording, and a link to the dated-changes guide.

The claim-by-claim review behind these corrections, with sources, is in the "Ready for hub review" comment on this PR.

• Changelog fragment: changelog.d/636-future-date-announcements-corrections.changed.md (changed).
• Docs and changelog only; no code changes.

🤖 Generated with Claude Code

[MaxGhenis]

UK hub (Claude build session, for Max)
Ready for hub review

Head: a60894ff7954eb28ce602ef10a32522f47031d3b

Read this first. The page is already on main through #2386 (batch commit d50ee85a9, merged 2026-10-21). Main then fixed its reversal recipe in d7ed2889a, and the changelog line shipped in 2.143.0 (CHANGELOG.md:190). As it stood, this branch would have reverted that fix (GitHub showed it CONFLICTING) and repeated the changelog line.

What this push changes:

• Merge: merges main in 0df12ed2c and resolves the add/add conflict to main's copy.
• Fragment: deletes the released changelog.d/636.added.md and adds changelog.d/636-future-date-announcements-corrections.changed.md (type changed, so the docs-only edit isn't held by the Fix-evidence gate).
• Page: corrects main's copy.

Against main, the diff is now just the page corrections and the new fragment. Suggested title on landing: "Correct the future-dated announcements page".

Claims checked (main = a45baf5e4, 2.148.2)

Claim	Verdict	Source
Parameters are date-keyed; future rows exist	true	parameters/gov/dwp/universal_credit/elements/child/limit/child_count.yaml:2-5; personal_allowance/amount.yaml:32-37
"since the model moved to date-keyed values"	fixed: date-keyed since the initial import	d0f05315b (2020-08-07)
convert_to_fiscal_year_parameters runs at system build; 30 April default; fiscal_year_blend day-weights; preserve_calendar_dates skipped	true; added "gov tree, 2015 to 2040"	utils/parameters.py:100-142 (YEARS :125); tax_benefit_system.py:224
Fuel duty carries fiscal_year_blend	true	parameters/gov/hmrc/fuel_duty/petrol_and_diesel.yaml
"their formulas annualise explicitly"	reworded: the readers split the year themselves	utils/excise.py; variables/gov/hmrc/alcohol_duty/beer_duty.py:19; tobacco_duty/tobacco_duty.py:29
Personal allowance YAML excerpt (2021, 2027, 2030 rows; Finance Act 2026 s. 10 reference)	true, matches the file	personal_allowance/amount.yaml:9-37; https://www.legislation.gov.uk/ukpga/2026/11/section/10
File has no uprating; s. 57 indexation from 2031	true; "up to 2030" narrowed to "2021 to 2030"	create_threshold_indexation.py:25-27,155-221; tests/test_threshold_indexation.py:88-89
Truss growth plan dates	made precise: the 23 September 2022 plan brought the 19% cut forward to April 2023; reversed 17 October 2022	gov.uk Growth Plan 2022 and the 17 October 2022 statement (review agent's fetch)
Reversal recipe	true on main (d7ed2889a); this branch had the broken one	utils/parameters.py:135 (30 April sampling)
No "policy as announced on date X" switch	true	grep of policyengine_uk/
Excise page explains "how dated reforms are annualised"	fixed: it covers excise only; now also links usage/scenarios.md "Dated changes"	docs/book/usage/scenarios.md:372-417; docs/engineering/excise-duties.md:30-36
national_insurance/class_1/rates/employee/main.yaml	fixed: the file was removed by 0d8ed3631; the rate is class_1.employee_scale[1].rate	employee_scale.yaml:112-145; utils/ni_parameter_scales.py:24
13.25% "under the Health and Social Care Levy", 12% "when the levy was repealed"	fixed: s. 5 was a temporary NIC rise for 2022-23; s. 2(1) of the Repeal Act kept it only for earnings paid before 6 November 2022	https://www.legislation.gov.uk/ukpga/2021/28/section/5/enacted; https://www.legislation.gov.uk/ukpga/2022/43/section/2
Values 13.25% / 12% / 10% / 8%	true, and with no blend the annual values are 13.25% (2022), 12% (2023) and 8% (2024+)	employee_scale.yaml:115-141; open issue #1807
"the most common future-dating pattern"	softened to "a common": no count supports "most"	none
Two-child limit row (2 until 2026-04-06, then .inf); UC child element reads it	true; added that it is now enacted	child_count.yaml:2-5; uc_individual_child_element.py:31-32; https://www.legislation.gov.uk/ukpga/2026/13/section/1
Cost-of-Living Payment £650 / £900 / £0 from 2024-01-01	true	parameters/gov/treasury/cost_of_living_support/means_tested_households/amount.yaml:3-5
2022-04-06 NI row cites the HSCL Act 2021 and the Budget	true; path updated	employee_scale.yaml:116-123
gov.contrib.* is reform-side	true	parameters/gov/contrib/README.md:1-3
Research link title	matched to the page title	https://www.policyengine.org/uk/research/tax-cuts-in-prime-minister-trusss-growth-plan (200)

Corrections: 10.

Uncertain and out of scope

• employee_scale.yaml:122 titles the 2021 Budget PDF "Autumn Budget and Spending Review 2022".
• child_count.yaml still cites the revoked reg 24A and not the 2026 Act.

Both are parameter reference fixes, not part of this docs page.

Full claim ledger: ~/reviews/uk-hub/jobs/docs-c2/b/1727-ledger.md on Max's machine.